I ran out of the old lot of H-4350. The former load was 42.4 gr. The Heatstroke open is in a couple of weeks so I had better make darn sure the rifle and load are in top shape. I did load 50 of 42.4 gr and had immediately notcied the new lot of powder was slower than the old lot. Old DOPE no longer worked 500 yards +. So I loaded these test groups and tried them yesterday. The wind was not helping, but I had to do it when I had the time. The first group I purposfully dialed less elevation than what I needed for 300 yards. Every subsequent group I dialed up .3 Mil higher to spread them out for reading.
No pressure signs on anything, and 42.8 gr clocked in an average MV of 2838 fps with a 140 gr. A-max. ES of 11.